Nitrogen‐Doped Carbon‐Assisted One‐pot Tandem Reaction for Vinyl Chloride Production via Ethylene Oxychlorination

Abstract

Abifunctional catalyst comprising CuCl 2 /Al 2 O 3 and nitrogen-doped carbon was developed for an efficient one-pot ethylene oxychlorination process to produce vinyl chloride monomer (VCM) up to 76 %y ield at 250 8 8Ca nd under ambient pressure,whichishigher than the conventional industrial two-step process (% 50 %) in as ingle pass.Int he second bed, active sites containing N-functional groups on the metal-free N-doped carbon catalyzed both ethylene oxychlorinationa nd ethylene dichloride (EDC) dehydrochlorination under the mild conditions.Benefitting from the bifunctionality of the Ndoped carbon, VCM formation was intensified by the surface Cl*-looping of EDC dehydrochlorination and ethylene oxychlorination. Both reactions were enhanced by in situ consumption of surface Cl* by oxychlorination, in which Cl* was generated by EDC dehydrochlorination. This work offers ap romising alternative pathwayt oV CM production via ethylene oxychlorination at mild conditions through asingle pass reactor.

Insights into the Mechanism of Methanol Steam Reforming Tandem Reaction over CeO2 Supported Single-Site Catalysts

“…The tandem reactions catalyzed by functional nanostructures have been effectively studied. [34][35][36][37] Typically, tandem reactions occur on the multifunctional material surfaces or at the interface of different function materials. 34,38 Our previous mechanism studies of tandem reactions found the spatial arrangement of the interfaces of tandem catalyst could control the generation, diffusion and reaction of the intermediates and finally favor the selectivity of desired products.…”